A: Absolute and relative (rel) length changes (Δ) of the fascicles between knee angles corresponding to 0 Nm and 4 Nm net knee moment. B: Absolute and relative length changes of the distal tendon between these two knee angles.

<p>Fascicle length and tendon length are normalized to femur length (ℓ_{fasc_norm}, ℓt_{dist_norm}). Absolute as well as relative length changes of fascicles and tendons did not differ significantly between children with a spastic paresis (SP) and typically developing (TD) children. Data are presented as means ± SD.